Journal
ADVANCED MATERIALS
Volume 22, Issue 46, Pages 5301-5305Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201002454
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Funding
- National Science Foundation (NSF) [CBET-0946723, DMR-0819885]
- 3M through a Non-Tenured Faculty
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Graded donor-acceptor heterojunctions for efficient organic photovoltaic cells are fabricated using boron subphthalocyanine chloride (SubPc) and C-60. The graded heterojunction significantly increases the exciton diffusion efficiency relative to a planar architecture, and improves the charge collection efficiency relative to a uniformly mixed architecture. A power conversion efficiency of (4.2 +/- 0.1)% is realized in a graded heterojunction OPV at 100 mW cm(-2) AM1.5G illumination intensity.
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